Variable in C Language - Quiz

Explanation: There is no specific limit on the length of a variable name in C language. However, it is recommended to keep the variable names short and meaningful.

Q: In case of ordinary int variables

A. no bit is reserved for sign
B. rightmost bit is reserved for sign
C. leftmost bit is reserved for sign
D. None

Correct Option: C
Explanation:

In case of ordinary int variables leftmost bit is reserved for sign.

Q: Which of the following is a valid variable name declaration?

A. int ;a5;
B. int _a4;
C. int #a6;
D. int @a2;

Correct Option: B
Explanation:

Variable name can start with only two special characters, which are _(underscore) and $(doller).

Q: Which of the following is not a valid variable name declaration?

A. int a;
B. int a_5;
C. int _g;
D. int 6_d;

Correct Option: D
Explanation:

Variable name cannot start with a digit.

Q: Which of following is not a valid name for a C variable?

A. newdelhi
B. new_delhi
C. new delhi
D. none

Correct Option: C
Explanation:

new delhi is not a valid name for a C variable, because of space.

Q: Which symbol is used for the assignment of a value to a variable in C language?

A. ===
B. ==
C. =>
D. =

Correct Option:
Explanation:

Answer: d) =

Explanation: The symbol "=" is used for the assignment of a value to a variable in C language. For example, "x = 10;" assigns the value 10 to the variable x.

Q: All keywords in C are in

A. UpperCase letters
B. LowerCase letters
C. CamelCase letters
D. None

Correct Option: B
Explanation: <p>As C is a case-sensitive language, all keywords must be written in lowercase.</p> <p>Keywords are predefined, reserved words in C language and each of which is associated with specific features. These words help us to use the functionality of C language. They have special meaning to the compilers.</p> <p>There are total 32 keywords in C.</p> <table class="table table-bordered"> <tbody> <tr> <td>auto</td> <td>double</td> <td>int</td> <td>struct</td> </tr> <tr> <td>break</td> <td>else</td> <td>long</td> <td>switch</td> </tr> <tr> <td>case</td> <td>enum</td> <td>register</td> <td>typedef</td> </tr> <tr> <td>char</td> <td>extern</td> <td>return</td> <td>union</td> </tr> <tr> <td>continue</td> <td>for</td> <td>signed</td> <td>void</td> </tr> <tr> <td>do</td> <td>if</td> <td>static</td> <td>while</td> </tr> <tr> <td>default</td> <td>goto</td> <td>sizeof</td> <td>volatile</td> </tr> <tr> <td>const</td> <td>float</td> <td>short</td> <td>unsigned</td> </tr> </tbody> </table>

Q: Which keyword is used to declare a variable in C language?

A. int
B. var
C. vari
D. declare

Correct Option: A
Explanation:

Answer: a) int

Explanation: The keyword "int" is used to declare a variable in C language for integer data types. For example, "int x;" declares a variable named x of integer type.

Q: Which of the following is not a variable type?

A. int
B. float
C. char
D. real

Correct Option: D
Explanation:

real is not a variable type.

Q: Which one is not a c keyword

A. auto
B. extern
C. register
D. main

Correct Option: D
Explanation: main

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